Summary

Several cases of AIRPROX have been reported by an ANSP due to pilots reading back a clearance not intended for them at the same time as the pilot for whom the clearance was intended. The ATCO did not detect the error because the transmission was hidden (technical systems transmitting best signal only). Other agencies have reported similar occurrences.

The following Safety Recommendations are made to reduce the risk of (Undetected) Simultaneous Transmissions: